140 lines
5.0 KiB
Java
140 lines
5.0 KiB
Java
/*
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 4531526
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* @summary Test that more than one debuggee cannot bind to same port
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* at the same time.
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* @library /test/lib
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*
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* @modules java.management
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* jdk.jdi
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* @build VMConnection ExclusiveBind HelloWorld
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* @run driver ExclusiveBind
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*/
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import java.net.ServerSocket;
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import com.sun.jdi.Bootstrap;
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import com.sun.jdi.VirtualMachine;
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import com.sun.jdi.connect.Connector;
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import com.sun.jdi.connect.AttachingConnector;
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import java.util.ArrayList;
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import java.util.Map;
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import java.util.List;
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import java.util.Iterator;
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import java.util.concurrent.TimeUnit;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.Utils;
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public class ExclusiveBind {
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/*
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* Find a connector by name
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*/
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private static Connector findConnector(String name) {
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List connectors = Bootstrap.virtualMachineManager().allConnectors();
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Iterator iter = connectors.iterator();
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while (iter.hasNext()) {
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Connector connector = (Connector)iter.next();
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if (connector.name().equals(name)) {
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return connector;
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}
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}
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return null;
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}
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/*
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* Launch (in server mode) a debuggee with the given address and
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* suspend mode.
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*/
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private static ProcessBuilder prepareLauncher(String address, boolean suspend, String class_name) throws Exception {
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List<String> args = new ArrayList<>();
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for(String dbgOption : VMConnection.getDebuggeeVMOptions().split(" ")) {
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if (!dbgOption.trim().isEmpty()) {
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args.add(dbgOption);
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}
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}
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String lib = "-agentlib:jdwp=transport=dt_socket,server=y,suspend=";
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if (suspend) {
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lib += "y";
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} else {
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lib += "n";
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}
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lib += ",address=" + address;
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args.add(lib);
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args.add(class_name);
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return ProcessTools.createJavaProcessBuilder(args.toArray(new String[args.size()]));
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}
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/*
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* - pick a TCP port
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* - Launch a debuggee in server=y,suspend=y,address=${port}
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* - Launch a second debuggee in server=y,suspend=n with the same port
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* - Second debuggee should fail with an error (address already in use)
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* - For clean-up we attach to the first debuggee and resume it.
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*/
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public static void main(String args[]) throws Exception {
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// find a free port
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ServerSocket ss = new ServerSocket(0);
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int port = ss.getLocalPort();
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ss.close();
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String address = String.valueOf(port);
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// launch the first debuggee
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ProcessBuilder process1 = prepareLauncher(address, true, "HelloWorld");
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// start the debuggee and wait for the "ready" message
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Process p = ProcessTools.startProcess(
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"process1",
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process1,
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line -> line.equals("Listening for transport dt_socket at address: " + address),
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Utils.adjustTimeout(5000),
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TimeUnit.MILLISECONDS
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);
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// launch a second debuggee with the same address
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ProcessBuilder process2 = prepareLauncher(address, false, "HelloWorld");
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// get exit status from second debuggee
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int exitCode = ProcessTools.startProcess("process2", process2).waitFor();
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// clean-up - attach to first debuggee and resume it
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AttachingConnector conn = (AttachingConnector)findConnector("com.sun.jdi.SocketAttach");
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Map conn_args = conn.defaultArguments();
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Connector.IntegerArgument port_arg =
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(Connector.IntegerArgument)conn_args.get("port");
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port_arg.setValue(port);
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VirtualMachine vm = conn.attach(conn_args);
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vm.resume();
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// if the second debuggee ran to completion then we've got a problem
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if (exitCode == 0) {
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throw new RuntimeException("Test failed - second debuggee didn't fail to bind");
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} else {
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System.out.println("Test passed - second debuggee correctly failed to bind");
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}
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}
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}
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